XXV, 1. Neue Literatur. 135 



f. Zeiclienapijarate. 



(Gueguen, F,,) Reglet for direct reading in microscopic uieasurements 

 (Journ. R. Microsc. 1908, pt. 2, p. 242; vgl. Compt. Rend. Soc. Biol. 

 de Paris vol. LXIII, 1907, p. 117—118). 



g. Verschiedenes. 



(Beck, C.,) Cantor Lectures : Theory of the microscope (Journ. R. Microsc. 



Soc. 1908, pt. 2, p. 245 ; vgl. Journ. of Soc. of Arts vol. LVI, no. 2875 



—2878). 

 (Dowdy, S. E.,) A micro-object Locater (Journ. R. Microsc. Soc. 1908, pt. 2, 



p. 242; vgl. Engl. Mecbanic vol. LXXXVI, 1908, p. 564—565). 

 (Fabre, C.,) Measurement of resolution in microscopy (Journ. R. Microsc. 



Soc. 1908, pt. 1, p. 103; vgl. Mem. de l'Acad. des Sc. Toulouse vol. VI, 



1906, p. 142—149). 

 (Filon, L. H. G.,) New method of measuring directly the double-refraction 



in strained glass (Journ. R. Microsc. Soc. 1908 , pt. 1 , p. 103 ; vgl. 



Proc. Roy. Soc. Ser. A, vol. LXXIX, 1907, p. 440—442). 

 Gordon, J. W., Mercury globules as test objects for the microscope 



(Journ. R. Microsc. Soc. 1908, pt. 1, p. 6). 

 Nelson, E. M., A Reply to professor Porter's and Mr. Evekitt's criti- 



cisrn upon my paper on the resolving power etc. (Journ. R. Microsc. 



Soc. 1908, pt. 1, p. 1). 

 Nelson, E. M., Francis Watkin's Microscope (Journ. R. Microsc. Soc. 1908, 



pt. 2, p. 137). 

 Nelson, E. M. , Gregory and Wright's Microscope (Journ. R. Microsc. 



S(.c. 1908, pt. 2, p. 154). 

 Nelson, E. M., Biddulphia mobiliensis (Journ. R. Microsc. Soc. 1908, pt. 2, 



p. 158). 

 Porter, A, W. , On the diffraction rings for a circular opening; and on 



the limit of resolving power. Being a rejoinder to Mr. Nelson (Journ. 



R. Miscosc. Soc. 1908, pt. 1, p. 3). 

 Compass reading to Vsoo ("" Viooo Millimetre (Journ. R. Microsc. Soc, 1907, 



pt. 2, p. 245; vgl. Catal. de la Soc. genevoise pour la construction 



d'instruments de phys. et de mecan. 1907, p. 44). 



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